Sea Ledger, December 2007

2007-12-01 to 2007-12-31 · archive

issued: 363
warning-days in force: 17,390
in force at month end: 553
sea × type cells: 276

baseline: same month, previous 5 years (2006-12, 2005-12, 2004-12, 2003-12, 2002-12)

By type

type	issued	warning-days	in force at end
Cable ops	63	1,540	52
Incidents	57	1,639.2	54
Nav aids	45	5,895.4	195
Exercises	43	758	20
Quakes	42	188.7	4
Derelicts	21	311.8	11
Spills	19	263.1	5
Surveys	17	2,180.5	70
Containers	17	96.8	0
Other	10	1,138	37
Debris	10	100.9	2
Missiles	8	76.9	2
Icebergs	7	42.1	1
Volcanic	2	278.9	9
Wrecks	1	1,918.5	62
Restricted	1	346.8	10
Towing	0	1.6	0
Ordnance	0	196.7	6
Structures	0	310	10
Piracy	0	106.5	3

By sea and type · 200 cells, most issued first

cell	issued	warning-days	at end	longest d	vs 5 y
Cable ops · South Atlantic Ocean	28	131.1	5	33	2.0× / 14.2
Quakes · South Pacific Ocean	15	44.9	1	32	1.1× / 13.4
Containers · Celtic Seasurge	12	65.4	0	—	30× / 0.4
Quakes · North Pacific Ocean	11	32	1	19	1.7× / 6.4
Nav aids · North Seasurgelong running	10	373.4	13	438	2.4× / 4.2
Incidents · North Pacific Ocean	10	233.6	10	106	1.0× / 10.4
Cable ops · North Atlantic Oceansurge	9	101.7	4	234	9.0× / 1
Exercises · Bay of Bengal	9	97.5	5	58	1.3× / 6.8
Incidents · South Pacific Ocean	8	151.9	5	111	1.0× / 7.8
Spills · Gulf of Mexicosurge	8	106	3	45	2.2× / 3.6
Missiles · North Pacific Ocean	8	76.9	2	57	1.7× / 4.8
Exercises · North Pacific Ocean	7	54.7	1	35	1.1× / 6.4
Icebergs · Southern Oceansurge	7	42.1	1	33	3.5× / 2
Nav aids · North Pacific Oceansurgelong running	6	416	14	894	30× / 0.2
Exercises · North Atlantic Ocean	6	73	0	—	0.6× / 9.6
Derelicts · North Atlantic Oceansurge	6	40.7	0	—	3.0× / 2
Debris · Celtic Seasurge	6	32.1	0	—	6.0× / 1
Incidents · South China Sea	5	224.4	7	111	0.8× / 6.6
Incidents · North Atlantic Ocean	5	169.6	6	113	1.1× / 4.6
Spills · North Atlantic Ocean	5	69	2	45	1.9× / 2.6
Nav aids · Coral Sealong running	4	523.2	18	1,275	1.2× / 3.4
Nav aids · Irish Sea and St. George's Channelsurgelong running	4	164.1	6	662	2.0× / 2
Derelicts · South China Seasurge	4	97.1	2	60	6.7× / 0.6
Exercises · Yellow Seasurge	4	84.2	2	33	2.9× / 1.4
Cable ops · Arabian Sea	4	75	5	96	1.4× / 2.8
Incidents · South Atlantic Ocean	4	48.6	2	34	0.8× / 5
Incidents · Bay of Biscaysurge	4	31.7	1	89	20× / 0.2
Nav aids · Gulf of Californianew	4	31.7	4	30	new / 0
Exercises · Mediterranean Sea - Eastern Basin	4	8.3	0	—	1.4× / 2.8
Nav aids · South Atlantic Oceanlong running	3	196.4	7	422	0.8× / 3.8
Surveys · North Atlantic Oceanlong running	3	108.2	4	635	1.4× / 2.2
Other · South Atlantic Oceansurgelong running	3	104.2	3	457	7.5× / 0.4
Surveys · Mediterranean Sea - Eastern Basinsurge	3	33.3	1	28	3.0× / 1
Cable ops · Philippine Seanew	3	33.1	1	29	new / 0
Cable ops · Aegean Seanew	3	24.5	1	24	new / 0
Cable ops · Eastern China Seasurge	3	23.1	1	30	15× / 0.2
Exercises · Arabian Sea	3	18.9	1	26	0.9× / 3.4
Exercises · South Pacific Ocean	3	15.8	0	—	0.9× / 3.2
Incidents · Coral Sea	3	12.4	1	76	1.9× / 1.6
Derelicts · Caribbean Seasurge	3	10.3	1	12	15× / 0.2
Quakes · Philippine Sea	3	9	0	—	1.5× / 2
Quakes · Solomon Seasurge	3	9	0	—	2.5× / 1.2
Incidents · Caribbean Seasurge	3	0.4	0	—	15× / 0.2
Cable ops · Mediterranean Sea - Eastern Basin	2	175	5	176	0.7× / 3
Incidents · Indian Ocean	2	161.5	5	224	1.1× / 1.8
Incidents · Philippine Sea	2	147.9	4	105	0.3× / 6.2
Nav aids · North Atlantic Oceanlong running	2	118.9	3	713	0.7× / 2.8
Nav aids · Great Australian Bightlong running	2	113.7	4	483	5.0× / 0.4
Cable ops · Gulf of Mexico	2	97.7	3	133	10× / 0.2
Volcanic · Philippine Sealong running	2	92.9	3	453	5.0× / 0.4
Nav aids · Celtic Sea	2	90.7	3	200	1.1× / 1.8
Exercises · Japan Sea	2	67.2	2	32	2.0× / 1
Nav aids · English Channellong running	2	65.5	2	806	0.6× / 3.2
Incidents · Mozambique Channel	2	52.5	2	88	2.5× / 0.8
Surveys · Arabian Sealong running	2	49.7	2	720	10× / 0.2
Surveys · South Atlantic Ocean	2	40.3	1	196	0.8× / 2.4
Surveys · North Sealong running	2	35.8	2	602	1.0× / 2
Other · North Sea	2	34.4	2	149	3.3× / 0.6
Spills · The Coastal Waters of Southeast Alaska and British Columbia	2	34	0	—	10× / 0.2
Spills · Yellow Seanew	2	22.1	0	—	new / 0
Incidents · Andaman or Burma Seanew	2	18.4	1	18	new / 0
Containers · North Atlantic Ocean	2	12.7	0	—	1.1× / 1.8
Quakes · Banda Sea	2	6	0	—	3.3× / 0.6
Quakes · Indian Ocean	2	6	0	—	0.3× / 6.6
Quakes · Southern Oceannew	2	6	0	—	new / 0
Nav aids · Tasman Sealong running	1	177.6	6	688	5.0× / 0.2
Wrecks · English Channel	1	151.5	5	207	5.0× / 0.2
Nav aids · Persian Gulflong running	1	149.6	5	499	5.0× / 0.2
Nav aids · Bass Straitlong running	1	127.7	4	469	1.7× / 0.6
Cable ops · South China Sea	1	125.6	5	295	new / 0
Cable ops · Gulf of Guinea	1	90.4	3	287	1.0× / 1
Cable ops · Caribbean Sea	1	74.8	3	270	new / 0
Other · South Pacific Oceanlong running	1	63.6	2	553	2.5× / 0.4
Cable ops · Bay of Bengal	1	62.4	3	41	0.6× / 1.8
Cable ops · Sea of Marmara	1	54.2	1	178	new / 0
Cable ops · Black Sea	1	45	1	59	1.0× / 1
Other · Bay of Bengallong running	1	43.9	2	427	new / 0
Nav aids · Mediterranean Sea - Western Basinlong running	1	33.1	1	619	0.3× / 3.8
Exercises · Laccadive Sea	1	32.1	1	31	0.1× / 10.8
Surveys · Caribbean Sea	1	31.6	1	52	new / 0
Other · Inner Seas off the West Coast of Scotland	1	31.1	1	68	new / 0
Incidents · Laccadive Sea	1	31.1	1	54	1.0× / 1
Incidents · Arabian Sea	1	30	1	114	1.7× / 0.6
Incidents · Bass Strait	1	28.8	1	28	new / 0
Surveys · Bay of Bengal	1	27.7	1	77	5.0× / 0.2
Cable ops · Japan Sea	1	26.4	1	140	new / 0
Debris · Aegean Sea	1	24.9	1	24	new / 0
Cable ops · Java Sea	1	23.6	0	—	5.0× / 0.2
Restricted · North Atlantic Ocean	1	18.6	0	—	2.5× / 0.4
Incidents · Bay of Bengal	1	18	1	77	0.8× / 1.2
Exercises · Baltic Sea	1	15.9	0	—	new / 0
Surveys · Gulf of Mexico	1	15	1	14	2.5× / 0.4
Spills · North Pacific Ocean	1	14	0	—	1.0× / 1
Exercises · Norwegian Sea	1	14	1	32	5.0× / 0.2
Spills · Philippine Sea	1	14	0	—	new / 0
Incidents · Great Australian Bight	1	12.9	1	12	5.0× / 0.2
Incidents · Adriatic Sea	1	11.3	1	95	1.7× / 0.6
Derelicts · Sulu Sea	1	11.2	1	11	new / 0
Surveys · Aegean Sea	1	10.3	0	—	new / 0
Other · Arafura Sea	1	8.2	1	8	new / 0
Derelicts · Bass Strait	1	6.8	0	—	new / 0
Containers · South Atlantic Ocean	1	6.8	0	—	new / 0
Derelicts · Red Sea	1	6.6	0	—	new / 0
Debris · North Atlantic Ocean	1	6.5	0	—	1.0× / 1
Debris · South Atlantic Ocean	1	6.1	0	—	1.7× / 0.6
Containers · Caribbean Sea	1	5.9	0	—	new / 0
Exercises · Bering Sea	1	5.7	0	—	new / 0
Derelicts · Andaman or Burma Sea	1	5.2	1	5	new / 0
Derelicts · Coral Sea	1	3.8	1	3	5.0× / 0.2
Derelicts · Mediterranean Sea - Eastern Basin	1	3.4	1	3	1.0× / 1
Quakes · Bismarck Sea	1	3	0	—	1.0× / 1
Quakes · Coral Sea	1	3	0	—	2.5× / 0.4
Quakes · Molukka Sea	1	3	0	—	1.3× / 0.8
Quakes · North Atlantic Ocean	1	3	0	—	1.7× / 0.6
Nav aids · Bristol Channel	1	2.6	0	—	1.7× / 0.6
Surveys · Great Australian Bight	1	2.2	0	—	new / 0
Other · North Pacific Ocean	1	2.2	0	—	1.0× / 1
Derelicts · English Channel	1	1.8	0	—	5.0× / 0.2
Cable ops · South Pacific Ocean	1	1.3	0	—	new / 0
Derelicts · South Atlantic Ocean	1	0.9	0	—	0.4× / 2.6
Nav aids · Timor Sea	1	0.7	0	—	2.5× / 0.4
Exercises · Philippine Sea	1	0.6	1	0	0.7× / 1.4
Debris · Bay of Biscay	1	0.3	0	—	new / 0
Incidents · North Sea	1	0.1	0	—	5.0× / 0.2
Containers · Bay of Biscay	1	0	0	—	new / 0
Surveys · Beaufort Sealong running	0	713	23	1,453	— / 0
Nav aids · South Pacific Oceanlong running	0	532.4	17	725	0.0× / 1.6
Nav aids · Arabian Sealong running	0	405.7	13	721	0.0× / 3.4
Surveys · Arctic Oceanlong running	0	403	13	1,453	— / 0
Nav aids · Caribbean Sealong running	0	372	12	931	0.0× / 0.4
Nav aids · Indian Oceanlong running	0	372	12	595	0.0× / 0.8
Nav aids · Bay of Bengallong running	0	248	8	931	0.0× / 1.4
Wrecks · North Sealong running	0	248	8	825	0.0× / 2.8
Nav aids · Mozambique Channellong running	0	236.3	7	993	0.0× / 0.2
Wrecks · Mediterranean Sea - Eastern Basinlong running	0	217	7	1,281	— / 0
Wrecks · Persian Gulflong running	0	217	7	520	0.0× / 0.2
Exercises · Aegean Sea	0	185.6	4	362	0.0× / 4.2
Surveys · Baffin Baylong running	0	155	5	1,551	— / 0
Nav aids · Gulf of Mexicolong running	0	155	5	994	— / 0
Nav aids · Inner Seas off the West Coast of Scotlandlong running	0	155	5	571	0.0× / 1.6
Nav aids · Laccadive Sealong running	0	155	5	724	0.0× / 1.2
Structures · Mediterranean Sea - Eastern Basinlong running	0	155	5	557	— / 0
Nav aids · Arafura Sealong running	0	124	4	511	0.0× / 0.2
Nav aids · Bering Sealong running	0	124	4	530	— / 0
Wrecks · South China Sealong running	0	124	4	1,166	0.0× / 0.2
Wrecks · Arabian Sealong running	0	93	3	618	0.0× / 0.4
Surveys · Laptev Sealong running	0	93	3	587	— / 0
Ordnance · North Sea	0	93	3	234	— / 0
Other · Persian Gulflong running	0	93	3	693	0.0× / 0.6
Other · South China Sealong running	0	93	3	565	— / 0
Cable ops · Tasman Sealong running	0	92.6	2	701	— / 0
Other · Arabian Sealong running	0	82.7	2	684	0.0× / 0.6
Surveys · Gulf of Suezlong running	0	76.4	2	531	0.0× / 0.2
Piracy · Gulf of Aden	0	75.5	2	63	— / 0
Restricted · North Sealong running	0	63.6	2	511	0.0× / 0.2
Nav aids · Gulf of Suezlong running	0	63.4	2	382	0.0× / 0.4
Nav aids · Andaman or Burma Sealong running	0	62	2	789	0.0× / 0.4
Derelicts · Arabian Sea	0	62	2	188	0.0× / 0.4
Quakes · Bay of Bengallong running	0	62	2	385	0.0× / 5.8
Wrecks · Bay of Bengallong running	0	62	2	577	— / 0
Wrecks · Coral Sealong running	0	62	2	705	0.0× / 0.2
Other · Indian Oceanlong running	0	62	2	648	0.0× / 0.2
Wrecks · Indian Oceanlong running	0	62	2	1,120	0.0× / 0.4
Exercises · Ionian Sea	0	62	2	353	0.0× / 2.2
Other · Mediterranean Sea - Eastern Basin	0	62	2	256	0.0× / 0.6
Cable ops · North Pacific Ocean	0	62	2	35	— / 0
Structures · North Sealong running	0	62	2	497	— / 0
Wrecks · Philippine Sealong running	0	62	2	630	— / 0
Wrecks · South Atlantic Oceanlong running	0	62	2	1,023	0.0× / 0.4
Volcanic · South Pacific Ocean	0	62	2	331	0.0× / 0.2
Wrecks · South Pacific Oceanlong running	0	62	2	472	0.0× / 0.2
Wrecks · Southern Oceanlong running	0	62	2	375	0.0× / 0.2
Wrecks · Tasman Sealong running	0	62	2	591	— / 0
Surveys · The Northwestern Passageslong running	0	62	2	436	— / 0
Ordnance · Tyrrhenian Sealong running	0	62	2	410	— / 0
Wrecks · Tyrrhenian Sealong running	0	62	2	650	— / 0
Incidents · Japan Sea	0	53.1	1	90	— / 0
Incidents · Tasman Sea	0	53.1	1	87	0.0× / 1.8
Incidents · Gulf of Guinea	0	51.7	1	53	0.0× / 0.4
Cable ops · Gulf of Suez	0	45.4	1	69	0.0× / 0.4
Nav aids · Baltic Sea	0	43.6	1	196	— / 0
Nav aids · Tyrrhenian Sealong running	0	37.5	1	1,138	0.0× / 1.6
Cable ops · North Sea	0	32.6	1	264	0.0× / 1.8
Other · Coral Sea	0	32.4	1	295	0.0× / 0.2
Cable ops · Indian Ocean	0	32.4	1	340	0.0× / 0.2
Cable ops · Persian Gulf	0	32.4	1	204	0.0× / 0.6
Nav aids · Sea of Okhotsklong running	0	32.4	1	559	— / 0
Restricted · Alboran Sea	0	31	1	154	— / 0
Cable ops · Andaman or Burma Sea	0	31	1	55	0.0× / 0.2
Other · Andaman or Burma Sea	0	31	1	88	— / 0
Debris · Arctic Oceanlong running	0	31	1	1,105	0.0× / 0.2
Other · Arctic Ocean	0	31	1	118	— / 0
Volcanic · Banda Sea	0	31	1	273	— / 0
Other · Bass Strait	0	31	1	43	— / 0
Derelicts · Bay of Bengal	0	31	1	44	0.0× / 0.6
Restricted · Bay of Bengallong running	0	31	1	622	— / 0
Surveys · Bering Sea	0	31	1	104	— / 0
Ordnance · Black Sea	0	31	1	217	— / 0
Wrecks · Black Sea	0	31	1	154	— / 0
Other · Caribbean Sea	0	31	1	173	— / 0

Cite: seahazards.com Sea Ledger, 2007-12, retrieved 2026-09-03

Not for navigation. Warning-days = days each warning was in force within the month, summed. Only warnings we display are counted; the ratio compares warnings issued with the mean of the reference months.